Overview: The Khalka Mongol of United Kingdom, numbering 4,200, are Engaged yet Unreached. They are part of the Mongolian people cluster within the East Asian Peoples affinity bloc. Globally, this group totals 2,831,225 in 10 countries. Their primary language is Halh Mongolian. The primary religion practiced by the Khalka Mongol is atheism, which is best described as the rejection of belief that any deities exist.